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A jar of peanuts is supposed to have12 ounces of peanuts. The filling machine inevitably experiences...

A jar of peanuts is supposed to have12

ounces of peanuts. The filling machine inevitably experiences fluctuations in the filling, so a quality-control manager randomly samples 12 jars of peanuts from the storage facility and measures their contents. She obtains the accompanying data.

11.95,11.72,12.21,11.32,11.86,11.84,11.48,12.14,11.75,11.51,12.25,12.56

Is data normally distributed? What is the sample standard deviation?

Math   Statistics-And-Probability   
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